Just got this off E-bay. I have been wanting one of these for a while for my gas station collection but nice ones go for too much, so I settled on this damaged one. This is porcelain and the 18" version. It is in nice condition except that someone cut the mounting flange off and drilled 3 holes in it to mount it flat. I will look into replaceing the flange some how, I have my eye on an old payphone to go under this sign. enjoy